Attribute Macro request_query 

#[request_query]

Extracts a specific request query parameter into a variable with panic on missing value.

This attribute macro retrieves a specific request query parameter by key and makes it available as a variable. Query parameters are extracted from the URL request query string. If the requested query parameter does not exist, the function will panic with an error message.

Usage

use hyperlane::*;
use hyperlane_macros::*;

#[route("/request_query")]
struct RequestQuery;

impl ServerHook for RequestQuery {
    async fn new(_ctx: &Context) -> Self {
        Self
    }

    #[prologue_macros(
        request_query("test" => request_query),
        response_body(&format!("request query: {request_query}")),
        send
    )]
    async fn handle(self, ctx: &Context) {}
}

impl RequestQuery {
    #[request_query("test" => request_query)]
    async fn request_query_with_ref_self(&self, ctx: &Context) {}
}

#[request_query("test" => request_query)]
async fn standalone_request_query_handler(ctx: &Context) {}

The macro accepts a key-to-variable mapping in the format "key" => variable_name. The variable will be available as an RequestQuerysValue in the function scope.

Supports multiple parameters: #[request_query("k1" => v1, "k2" => v2)]

Panics

This macro will panic if the requested query parameter does not exist in the URL query string.